US1790479A - Automatic selecting bab - Google Patents

Automatic selecting bab Download PDF

Info

Publication number
US1790479A
US1790479A US1790479DA US1790479A US 1790479 A US1790479 A US 1790479A US 1790479D A US1790479D A US 1790479DA US 1790479 A US1790479 A US 1790479A
Authority
US
United States
Prior art keywords
carriage
machine
bar
card
recording
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication date
Application granted granted Critical
Publication of US1790479A publication Critical patent/US1790479A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Definitions

  • the present invention relates to card perforating mechanism for record cards, and
  • Some of the objects of the present inventio.. a. to providel a control for a card perforating machine through the operation of a typewriter, a "bookkeeping machine, an adding machine, or any other separately functioning machine; to provide an automatically selective means for causing only certain predetermined columns of typewritten matter to be perforated on a record card; to provide means for periodically and automatically preventing and permitting the production of perforations during the operation' of a separate controlling machine; to
  • rovide a multiple control device for perorating machines whereby any one of a number of controls can be employed to produce respectively predetermined operations of the perforating machine; to provide a settable control for perforating machines whereby any one of a number of different group perforations can be made in a record card or cards; to provide a selecting bar for a per forating machine having a plurality of universal controls differing in character; to provide a control means of multiple positions arranged to be set to cause a predetermined perforating operation; and to provide other improvements as will hereinafter appear.
  • Fig. 1 represents a side elevation of a typewriter equipped with one form of the present in- Ventron;
  • Fig. 2 represents a detail of the same showing the selecting bar of the present invention in front elevation;
  • Fig. 3 is a diagram of the control circuits; and
  • Fig. 4 is a diagram representing any one of the key control circuits.
  • Fig. 4 attention is first directed to Fig. 4 in order that a clear understanding of the resulting function of the present invention may be had.
  • the present embodiment of the invention it is shown as arranged to control selectivel the energizationa of a plurality of solenoi s 10, one of which is in each controlcircuit and for the purpose of simpliiied description,
  • this punch mechanism is one unit of a complete card punching mechanism wherein latches, such as 14, are selectively set so that the respective punches, controlled by the set latches, function to perforate the card, while those punches which are not held by said latches are free to move with the card and do not perforate it. More detailed information as to the punch structure may be had by reference to United States Letters Patent No. 1,305,557, whih mechanism has here been selected to represent the operation of the present invention.
  • the solenoid 10 is includedv in a circuit having a conductor 20 connected to a contactor 21 which is oppositely disposed with respect toa contact 22 connected by a conductor 213 to a contact 24.
  • the contactor 21 is arranged to be operated by the ordinary actuation of a key 25 of a typewriter 26, this key 25, as here shown, being one of the number keys of the typewriter.
  • a contactor 27 is connected to the common return conductor 28 of the circuit which includes a rheostat 30, a switch 31 and a generator 32.
  • the foregoing circuit may be taken as any one of the typewriter number key control circuits of Fig. 3 and since the contactor 27 is in the common return of all circuits, the operation of any circuit typewriter number key when this contactor 27 is closed, will cause the circuit corresponding to that typewriter number vkey to close and thus set the punch corresponding to the actuated key 25. For example, if the number 8 key of the typewriter is actuated, its' circuit will be closed and punch number 8 in the unch mechanism will be set to punch ahole mthe movement of one face of a selecting bar 34.
  • this bar is squarein cross section so that it may be provided with fourcontrolsurfaces though it will be understood the invention is not limited to this number of control surfaces but comprehends the use of a bar of polygonal section any face of which may be used for control purposes.
  • Figs. l and 4 the bar is shown as provided with four control surfaces while in Fig. 2 it is shown as provided with two control surfaces. One of the surfaces may be high or low throughout the whole length of the bar as is obvious.
  • this selecting bar 34 is mounted upon the carriage 35 of the typewriter while the contactor 27 and its associated parts are carried by the fixed frame 36 of the typewriter. It will thus be seen, as the typewriter carriage moves step by step across the machine, that the selectingbar 34 will likewise move beneath the contact roller 33.
  • the control faces of the bar 34 are provided with dwells 37 formed by recesses 38 cut respectively transversely in the faces of the bar ⁇ l34.
  • the arrangement of the bar with respect to the contact roller 33 is such that when a dwell 37 engages the roller 33, it will move the contactor 27 against the contact 24, but when a recess 38 arrives opposite to the roller 33 no movement of the contactor 27 will take place because the depth of the recess receives the roller 33 34 and having such dwells of predetermined without imparting movement to it. Therefore, by arranging the dwells 37 at predetermined locations along the selecting bar length, one column of the card or several successive columns of the card are automatically selected for punching.
  • theibar 34 Since different card groups may require vdifferent column punching from other card groups, theibar 34 has each face provided with differently arranged dwells and in this way a predetermined card punching is made for each group of cards. 40 for turning movement and has a hand wheel 41 by which it can be given the necessary partial rotation to bring a face into operative osition and in which position the bar 34 is firmly held by a detent spring 42.v
  • a condenser 43 In order to lessen trouble incident to sparking at the contacts, a condenser 43, of suitable capacity, bridges the circuit at the required location.
  • the bar 34 is mounted in brackets closers are provided, one, 44, being arranged to be operated by the carriage return manual control key45 of the machine; another 46 for skip purposes; another 47 for manual controlof the punch and typewriter carriage return and being arranged in parallel with the circuit closer 48 which serves to bring about the automatic return of the punch carriage.
  • the typewriter space bar is shown by reference 50.
  • circuit closers including the contactors 27 are numbered to correspond to the number positions of a card column and while but two keys 25 are shown in this diagram, it is to be understood' that there is a key 25 for each closer and the omission is made only for simplification of the drawings.
  • the operation is as follows :n
  • the selecting bar 34 is rst set to bring the face, which 'has dwells 37 arranged to produce acard perforation arrangement corresponding to the group data to be listed or recorded by the separate controlling machine, in this instance
  • the successive dwells 37 shift the roller 33 to close the contactor 27, which is common to all of the circuits, so that the operation of any'number key 25 will close the circuit of the key operated and thus make a set-up of the punch controlled by that circuit.
  • thecommon circuit closer Vremains open and hence the operation of any number key will not cause any punch set-up to be made.
  • a recording mechanism comprising a carriage and a punching mechanism; means for causing a set-up to be made in the punching mechanism as a set-up is made in the recording mechanism, a bar supported onfsaid carriage for movement therewith, and means on the bar for controlling the eifectivity of said setup causin means.
  • a recording mechanism comprising a carriage and a punching mechanism; means for causing a set-up to be made Ain the punching mechanism as a set-up is made in the recording mechanism, a bar supported on said carriage for movement therewith, and high and low points on a face of said bar for controlling the eifectivity of said set-up causing means.
  • a recording mechanism comprising a carriage and a punching mechanism; means for causin a set-up to be made in the punching mec anism as a set-up is made in the recording mechanism, 'a bar mounted for movement with said carriage, and high and low portions of different lengths on said bar for controlling the eifectivity of said set-up causing means for variable extents of time.
  • a recording mechanism comprising a carriage and a punching mechanism; means for. causing a set-up to be madein the punching mechanism as a set-up is made in the recording mechanism, a rotatably mounted bar on said carriage, and means on different sides of f said bar for controlling the effectivity of said set-up causing means diferently as may be predetermined.
  • a recording machine comprising a carriage and a key board; of punches, an electro-magnet for each punch for controlling it for operation, a circuit closer for each key to energize a magnet when its corresponding key is depressed, a common circuit closer for all of said magnets, and a bar movable with said carriage and provided with high and low portions of dilierent lengths for opening and closing said circuits for different positions of the carriage and for maintaining said circuits opened and closed for different extents of movement of said carriage.
  • a recordin machine having a carriage, and a card-per orating machine, a system of punches in the perforating machine, punch-selecting devices, and actuating means which comprises relatively movable components mounted on the recording machine and by which desired action and inaction of those devices are made predetermined positions of the dependent on motionimparted to one of those los ⁇ ing relatively movable components mounted on the recording machine and its action bein dependent on movements imparted to one o those components by the carriage of the recordin machine.
  • a system of punches in the perforating machine and means which comprises a component mounted on the Jframe and another component mounted on and extending across the carriage of the recording machine and by which means the punching of a record of matter recorded in any predetermined field on a record sheet is made dependent on movement with the carriage o the latter component and its action 0n the other.
  • a system of punches in the punching machine and means which comprises a component mounted on the frame and another component mounted.
  • the latter component including formations corresponding to different fields in Which matter is recorded on a record-sheet, and by which means punching of a record of matter recorded in any predetermined field wherever on the sheet that field may be is made avoidable.
  • a system of punches in the perforating machine and means which comprises a component mounted on the frame and another component mounted on the carriage of the recording machine, one of these components crossing the other and being approximately as long as the carriage is Wide and including formations corresponding to different fields in which matter is recorded on a record-sheet, and by which means the punching of a record of matter recorded in any predetermined ield wherever on the record-sheet that Iield may be is made avoidable.

Landscapes

  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Description

Jan. 27, 1931'. w. w. LAsKER ET AL 1,790,479
`AUTOMATIC SELECTING BAR Filed Sept. 17, 1926 3 Sheets-Sheet l 1911.211991. WWMSKER Em 1,190,479
AUTOMATIC SELCTING BAR Filed Sept, 17, 1926 3 Sheets-Sheet 2 ORA/E y,
Jan. 27, 1931. w. w. LAsKER ET AL 1,790,479
AUTOMATIC SELEGTING BAR Filed Sept. 17, 1926 3 Sheets-Sheet 5 @M M By Patented JamV 27, 1931 UNITED STATI-:s
PATENT yOFFICE WILLIAM W. LASKEB, OF BROOKLYN, AND HAROLD R. RUSSELL, OF DOUGLASTON, NEW YORK, ASSIGNOBS, BY MESNE ASSIGNMENTS, TO REMINGTON RAND INC., OF NEW YORK, N. Y., A 4CORPORATION OF DELAWARE AUTOMATIC surnomme ma Application med September 17, 1926. Serial No. 136,075.
The present invention relates to card perforating mechanism for record cards, and
4more particularly to an automatic control for selective punch operation.
Some of the objects of the present inventio.. a.; to providel a control for a card perforating machine through the operation of a typewriter, a "bookkeeping machine, an adding machine, or any other separately functioning machine; to provide an automatically selective means for causing only certain predetermined columns of typewritten matter to be perforated on a record card; to provide means for periodically and automatically preventing and permitting the production of perforations during the operation' of a separate controlling machine; to
rovide a multiple control device for perorating machines whereby any one of a number of controls can be employed to produce respectively predetermined operations of the perforating machine; to provide a settable control for perforating machines whereby any one of a number of different group perforations can be made in a record card or cards; to provide a selecting bar for a per forating machine having a plurality of universal controls differing in character; to provide a control means of multiple positions arranged to be set to cause a predetermined perforating operation; and to provide other improvements as will hereinafter appear.
In the accompanying drawings, Fig. 1 represents a side elevation of a typewriter equipped with one form of the present in- Ventron; Fig. 2 represents a detail of the same showing the selecting bar of the present invention in front elevation; Fig. 3 is a diagram of the control circuits; and Fig. 4 is a diagram representing any one of the key control circuits. j
Referring to the drawings, attention is first directed to Fig. 4 in order that a clear understanding of the resulting function of the present invention may be had. In the present embodiment of the invention it is shown as arranged to control selectivel the energizationa of a plurality of solenoi s 10, one of which is in each controlcircuit and for the purpose of simpliiied description,
15, in order to prevent movement of a punch 16S/when the punch frame 17 and card registering plate 18 are moved upward relative to the punch 16. It may be said at this point, that this punch mechanism is one unit of a complete card punching mechanism wherein latches, such as 14, are selectively set so that the respective punches, controlled by the set latches, function to perforate the card, while those punches which are not held by said latches are free to move with the card and do not perforate it. More detailed information as to the punch structure may be had by reference to United States Letters Patent No. 1,305,557, whih mechanism has here been selected to represent the operation of the present invention.
The solenoid 10 is includedv in a circuit having a conductor 20 connected to a contactor 21 which is oppositely disposed with respect toa contact 22 connected by a conductor 213 to a contact 24.' The contactor 21 is arranged to be operated by the ordinary actuation of a key 25 of a typewriter 26, this key 25, as here shown, being one of the number keys of the typewriter. Oppositelydisposed with respect to the contact 24 is a contactor 27 connected to the common return conductor 28 of the circuit which includes a rheostat 30, a switch 31 and a generator 32.
The foregoing circuit may be taken as any one of the typewriter number key control circuits of Fig. 3 and since the contactor 27 is in the common return of all circuits, the operation of any circuit typewriter number key when this contactor 27 is closed, will cause the circuit corresponding to that typewriter number vkey to close and thus set the punch corresponding to the actuated key 25. For example, if the number 8 key of the typewriter is actuated, its' circuit will be closed and punch number 8 in the unch mechanism will be set to punch ahole mthe movement of one face of a selecting bar 34.
In the present instance, this bar is squarein cross section so that it may be provided with fourcontrolsurfaces though it will be understood the invention is not limited to this number of control surfaces but comprehends the use of a bar of polygonal section any face of which may be used for control purposes.
In Figs. l and 4, the bar is shown as provided with four control surfaces while in Fig. 2 it is shown as provided with two control surfaces. One of the surfaces may be high or low throughout the whole length of the bar as is obvious. As here shown this selecting bar 34 is mounted upon the carriage 35 of the typewriter while the contactor 27 and its associated parts are carried by the fixed frame 36 of the typewriter. It will thus be seen, as the typewriter carriage moves step by step across the machine, that the selectingbar 34 will likewise move beneath the contact roller 33.
In order to make automatic selection of the columnar typewritten matter columns `to be perforated on the card, the control faces of the bar 34 are provided with dwells 37 formed by recesses 38 cut respectively transversely in the faces of the bar`l34. The arrangement of the bar with respect to the contact roller 33 is such that when a dwell 37 engages the roller 33, it will move the contactor 27 against the contact 24, but when a recess 38 arrives opposite to the roller 33 no movement of the contactor 27 will take place because the depth of the recess receives the roller 33 34 and having such dwells of predetermined without imparting movement to it. Therefore, by arranging the dwells 37 at predetermined locations along the selecting bar length, one column of the card or several successive columns of the card are automatically selected for punching. Since different card groups may require vdifferent column punching from other card groups, theibar 34 has each face provided with differently arranged dwells and in this way a predetermined card punching is made for each group of cards. 40 for turning movement and has a hand wheel 41 by which it can be given the necessary partial rotation to bring a face into operative osition and in which position the bar 34 is firmly held by a detent spring 42.v
In order to lessen trouble incident to sparking at the contacts, a condenser 43, of suitable capacity, bridges the circuit at the required location.
Additional contactor operated circuit The bar 34 is mounted in brackets closers are provided, one, 44, being arranged to be operated by the carriage return manual control key45 of the machine; another 46 for skip purposes; another 47 for manual controlof the punch and typewriter carriage return and being arranged in parallel with the circuit closer 48 which serves to bring about the automatic return of the punch carriage. The typewriter space bar is shown by reference 50.
In Fig. 3, the circuit closers including the contactors 27 are numbered to correspond to the number positions of a card column and while but two keys 25 are shown in this diagram, it is to be understood' that there is a key 25 for each closer and the omission is made only for simplification of the drawings.
The operation is as follows :n The selecting bar 34 is rst set to bring the face, which 'has dwells 37 arranged to produce acard perforation arrangement corresponding to the group data to be listed or recorded by the separate controlling machine, in this instance During its travel the successive dwells 37 shift the roller 33 to close the contactor 27, which is common to all of the circuits, so that the operation of any'number key 25 will close the circuit of the key operated and thus make a set-up of the punch controlled by that circuit. When a' recess 38 is opposite the roller 33, thecommon circuit closer Vremains open and hence the operation of any number key will not cause any punch set-up to be made. In this way, the typewriter fimctions in the ordinary way making a record ofl the data typed, and only that part ofthe typewritten matter is perforated which has .een previously selected by the choice of selectlng bar face. While the present arrangement embodies a punch set-up from number keys of the typewriter it is obvious that sumlar control can be had by arranging for contact operation by letter keys or any other characters..
While the foregoing description has referred specifically to a typewriter, it is to be understood that suchreference is merely illustrative of one application of the invention because broadly the invention is applicable to many other machines and where in the claims the term recording machine occurs, it iste be taken as generic, meaning a typewriter, a tabulating machine, a bookkeeping machine, or any other machineforating mechanism through the medium of the present invention. v
Having thus described our invention, We claim:
1. In the combination of a recording mechanism comprising a carriage and a punching mechanism; means for causing a set-up to be made in the punching mechanism as a set-up is made in the recording mechanism, a bar supported onfsaid carriage for movement therewith, and means on the bar for controlling the eifectivity of said setup causin means.
2. In t e combination of a recording mechanism comprising a carriage and a punching mechanism; means for causing a set-up to be made Ain the punching mechanism as a set-up is made in the recording mechanism, a bar supported on said carriage for movement therewith, and high and low points on a face of said bar for controlling the eifectivity of said set-up causing means.
3. In the combination of a recording mechanism comprising a carriage and a punching mechanism; means for causin a set-up to be made in the punching mec anism as a set-up is made in the recording mechanism, 'a bar mounted for movement with said carriage, and high and low portions of different lengths on said bar for controlling the eifectivity of said set-up causing means for variable extents of time.
4. In the combination of a recording mechanism comprising a carriage and a punching mechanism; means for. causing a set-up to be madein the punching mechanism as a set-up is made in the recording mechanism, a rotatably mounted bar on said carriage, and means on different sides of f said bar for controlling the effectivity of said set-up causing means diferently as may be predetermined.
5. The combination with a recording machine comprisin a carriage and a key board; of punches, an eectroemagnet for each punch for controllin it for operation', a circuit closer for eac key to energize a magnet when its corresponding key is depressed, a common circuit closer for all of said magnets, and a bar movable with said carriage for opening and closing said common circuit closer for predetermined positions of the carriage.
6. The combination with a recording machine comprising a carriage and a key board;
of punches, an electro-magnet for each punch for controlling it for operation, a circuit closer for each key to energize a magnet p when its corresponding key is depressed, a
common circuit closer for all of said magnets, and a bar movable with said carriage and provided with high and low portions for opening and' closing said common circuit closer for carriage.
7. The combination with a recording machine comprising a carriage and a key board; of punches, an electro-magnet for each punch for controlling it for operation, a circuit closer for each key to energize a magnet when its corresponding key is depressed, a common circuit closer for all of said magnets, and a bar movable with said carriage and provided with high and low portions of dilierent lengths for opening and closing said circuits for different positions of the carriage and for maintaining said circuits opened and closed for different extents of movement of said carriage.
8. In the combination of a recordin machine having a carriage, and a card-per orating machine controlled by said recording machine; means traveling with the carriage of the recording machine for repeatedly making and breaking the connection to the perforating machine.
9. In the combination of a recording machine having a carriage, and a card-perforating machine, means for causing a set-up to be made in the perforating machine as matter is being recorded in the recording machine, and means carried by the carriage of the recording machine for disabling the aforesaid means so as to prevent the perforated card from forming a record of a predetermined portion of thevmatter recorded after the carriage has performed its function in the recording of other matter.
l0. In the combination of a recordin machine having a carriage, and a card-per orating machine, a system of punches in the perforating machine, punch-selecting devices, and actuating means which comprises relatively movable components mounted on the recording machine and by which desired action and inaction of those devices are made predetermined positions of the dependent on motionimparted to one of those los` ing relatively movable components mounted on the recording machine and its action bein dependent on movements imparted to one o those components by the carriage of the recordin machine.
12. n the combination of a recordin machine having a carriage, and a card-per orating machine, a system of punches in the perforating machine, and means which comprises relatively movable components mounted on the recording machine and by Which the punching of a record of matter recorded in any predetermined iield on a record sheet is made dependent on motion imparted to one of said components by the carriage of the recording machine.
13. In the combination of a recording machine having a carriage, and a card-perforating machine, a system of punches in the perforating machine, and means which comprises a component mounted on the Jframe and another component mounted on and extending across the carriage of the recording machine and by which means the punching of a record of matter recorded in any predetermined field on a record sheet is made dependent on movement with the carriage o the latter component and its action 0n the other. 14. In the combination of a recording machine having a carriage, and a card-perforating machine, asystem of punches in the punching machine, and means which comprises a component mounted on the frame and another component mounted. on and eX- tending .across the carriage of the recording machine, the latter component including formations corresponding to different fields in Which matter is recorded on a record-sheet, and by which means punching of a record of matter recorded in any predetermined field wherever on the sheet that field may be is made avoidable.
l5. In the combination of a recording machine having a carriage, and a card-perforating machine, a system of punches in the perforating machine and means which comprises a component mounted on the frame and another component mounted on the carriage of the recording machine, one of these components crossing the other and being approximately as long as the carriage is Wide and including formations corresponding to different fields in which matter is recorded on a record-sheet, and by which means the punching of a record of matter recorded in any predetermined ield wherever on the record-sheet that Iield may be is made avoidable.
Signed at New York, county of New York,
State of New York, this 17th day of August,
WILLIAM W. LASKER. HAROLD R. RUSSELL.
modera DISCLAIMER 1,7 90,117 9.-Wz'ZZam W. Lasher, Brooklyn, and Harold R. Russell, Douglaston, N. Y.
AUTOMATIC SELECTING BAR. Pate-nb dated January 27, 1931. Disclaimer filed June 6, 1941, by the assignee, Remington Rand Ine. Hereby enters this disclaimer to claims 1, 5, 8, 9, 10, 11, 12, 13, 14, and 15 in said specification.
[Oyjez'al Gazette July 1,1941] DISCLAIMER 1,7 90,47 9.-Wz'llz'am W. Lasher, Brooklyn, and Harold R. Russell, Douglaston, N. Y.
AUTOMATIC SELECTING BAR. Patent dated January 27, 1931. Disclaimer led June 6, 1941, by the assignee, Remington Ramal Ine. Hereby enters this disclaimer to Claims 1, 5, 8, 9, 10, 11, 12, 13, 14C, and 15 in said specicaton.
[Ojflcz'al Gazelle J zlly 1,1941]
US1790479D 1927-10-10 Automatic selecting bab Expired - Lifetime US1790479A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2676227A GB303844A (en) 1927-10-10 1927-10-10 Improvements in machines for punching statistical record cards

Publications (1)

Publication Number Publication Date
US1790479A true US1790479A (en) 1931-01-27

Family

ID=10248788

Family Applications (1)

Application Number Title Priority Date Filing Date
US1790479D Expired - Lifetime US1790479A (en) 1927-10-10 Automatic selecting bab

Country Status (3)

Country Link
US (1) US1790479A (en)
BE (1) BE346023A (en)
GB (1) GB303844A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566931A (en) * 1948-11-23 1951-09-04 Ibm Record card punching machine
US2784785A (en) * 1951-10-10 1957-03-12 Ibm Typewriter controlled tape punch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566931A (en) * 1948-11-23 1951-09-04 Ibm Record card punching machine
US2784785A (en) * 1951-10-10 1957-03-12 Ibm Typewriter controlled tape punch

Also Published As

Publication number Publication date
GB303844A (en) 1929-01-10
BE346023A (en)

Similar Documents

Publication Publication Date Title
US2377801A (en) Punching apparatus
US2997152A (en) Electrically controlled character printing apparatus
US1790479A (en) Automatic selecting bab
US1882766A (en) Printing mechanism for tabulating machines
US1292944A (en) Reproducer.
US2318325A (en) Letter writing machine
US2183820A (en) Recording system
US1519054A (en) Tabulating mechanism
US2865487A (en) Record controlled printing or writing machines
US2044707A (en) Card punching machine
GB562278A (en) Improvements in or relating to key-controlled printing and perforating mechanism
GB1006876A (en) A record sensing device in selective printers and like data processing equipment
US3018332A (en) Transmitting typewriter apparatus
US2490360A (en) Perforated record sensing device
US1843772A (en) Automatic indexing means for selecting bars
US2654432A (en) Card punching machine
US3217854A (en) Capital-shift mechanism for code printer
US1018519A (en) Perforating-machine.
USRE21719E (en) Punching machine fob records
US1219765A (en) Recording apparatus and device.
US1817501A (en) Printing mechanism for accounting machines
US2943150A (en) Type-printing telegraph apparatus
US2764410A (en) Card position selecting means
US2852076A (en) Typewriter controlled tape punch
US1110261A (en) Apparatus for perforating record-cards.